[CU2] To all the new Euro Auto owner out there!!!!

Hi all,

I have been talking to a few Euro 09 owners and realised that many of us have to same problem with the "clickling" noise during slow acceleration. All dealers use fuel as the excuse and keep pushing us back by telling us to test is again with a few tank of 98 fuel.
If you have the same problem, please complaint to the dealer and make sure they put it up to Honda Aust so that they can look into this!
At the end of the day, this is our car and we pay some good money for it. We must make sure we satisfy with what we purchase!
Thanks guys!!!

Or just buy a manual... :p

Quote:

---

Originally Posted by Type R Positive

Or just buy a manual... :p

---

Lucky you! :)

Quote:

---

Originally Posted by Type R Positive

Or just buy a manual... :p

---

Haha,smart ass(but true)

Quote:

---

Originally Posted by Type R Positive

Or just buy a manual... :p

---

... and wait four months for it to arrive. One month down, three to go ...

Quote:

---

Originally Posted by SteveH

... and wait four months for it to arrive. One month down, three to go ...

---

That's why I got in quick. I got the first one brought and delivered in the state baby! :cool:

Quote:

---

Originally Posted by Type R Positive

That's why I got in quick. I got the first one brought and delivered in the state baby! :cool:

---

I have to wait for a Navi on special order, so four months it is.

Quote:

---

Originally Posted by Type R Positive

Or just buy a manual... :p

---

If brains were dynamite you couldn't blow the wax out your ears

Quote:

---

Originally Posted by glengowan

If brains were dynamite you couldn't blow the wax out your ears

---

If you were any more stupid, you'd have to be watered twice a week. ;)

Quote:

---

Originally Posted by Type R Positive

Or just buy a manual... :p

---

..and have creaky clutch issues :p

lols!

Not yet thank god.....

Quote:

---

Originally Posted by Type R Positive

If you were any more stupid, you'd have to be watered twice a week. ;)

---

There are a lot of "Educated" and "Knowledgeable' people on this forum,sadly you are not one of them. So please refrain from talking drivel and leave the answers to people who genuinely want to help. :thumbdwn:

farrr chill pill man.
nuthin wrong with havin a bit of a laugh here n there.
"Why so serious" *joker voice. =]

n the original poster isnt asking for help.
hes posing out his opinion. and saying that people with the same problems should take action.
and just cause type r saidd "buy a manual" doesnt mean hes not educated or not knowledgeable.

you dont need to keep forums "spam friendly" it aint your job.
and if it was, you shoudnt accuse and jump to conclusions about ones level of education (or so to say).

relax buddy is all i can say. its comments like that, that turn threads upside down and turn to one big argument and mods close threads cause it gets no where.

relax.

TICK..TICK..TICK

*Waiting for mod to come with his big spanking stick.....pick me, pick me :)

Quote:

---

Originally Posted by OMG.JAI xD

farrr chill pill man.
nuthin wrong with havin a bit of a laugh here n there.
"Why so serious" *joker voice. =]

n the original poster isnt asking for help.
hes posing out his opinion. and saying that people with the same problems should take action.
and just cause type r saidd "buy a manual" doesnt mean hes not educated or not knowledgeable.

you dont need to keep forums "spam friendly" it aint your job.
and if it was, you shoudnt accuse and jump to conclusions about ones level of education (or so to say).

relax buddy is all i can say. its comments like that, that turn threads upside down and turn to one big argument and mods close threads cause it gets no where.

relax.

---

Point taken......my unreserved apology to type r, i got a bit carried away :(

Quote:

---

Originally Posted by glengowan

Point taken......my unreserved apology to type r, i got a bit carried away :(

---

All good bro.......

Quote:

---

Originally Posted by eur001

Hi all,
........All dealers use fuel as the excuse and keep pushing us back by telling us to test is again with a few tank of 98 fuel.........

---

What's with the 98 RON fuel? The CU2 is designed to run on 95 RON fuel. If it can't then Honda has misrepresented the car to people as requiring 95 RON when it (apparently, according fob-them-off dealers) should be running 98 RON. If it really does need 98 RON, then I'm not buying one and I'll just play with my teddy bear at home instead.

98 for sure......

Quote:

---

Originally Posted by glengowan

Point taken......my unreserved apology to type r, i got a bit carried away :(

---

It's ok brother. No one wanted help here, so let the shit slinging begin! :cool:

Quote:

---

Originally Posted by SPQR

What's with the 98 RON fuel? The CU2 is designed to run on 95 RON fuel. If it can't then Honda has misrepresented the car to people as requiring 95 RON when it (apparently, according fob-them-off dealers) should be running 98 RON. If it really does need 98 RON, then I'm not buying one and I'll just play with my teddy bear at home instead.

---

No need for 98 ron fuel. I can feel a recall coming on.......

Quote:

---

Originally Posted by LXRY

98 for sure......

---

Honda specifies 95.........

http://euro.honda.com.au/about-the-c...spx#powertrain

.........Which means that it should not require 98. If dealers say it does then Honda needs to change the specification so that people can make an informed choice. 95 RON is about $1.65 per litre in Darwin at the moment. 98 RON is over $2.00 per litre!!!

so even though honda recommend 95ron you still can't run it on 98ron ? Regardless of price.....

If i had to run my cl9 on 95 i would probably sell it.

runs like a champion on 98 ron and like a slug on 95ron

Of course you can run it on 98, but the point is the honda dealer is telling these guys to only use 98. It is not a fuel issue either. Mine runs just fine.

Quote:

---

Originally Posted by LXRY

so even though honda recommend 95ron you still can't run it on 98ron ? Regardless of price.....

---

95 RON is the minimum requirement for the CL9 and CU2. You can use 98 RON if you wish; but my point was that dealers have no business telling people to use 98 RON. If the car doesn't work perfectly on the Honda specified 95 RON then Honda has misrepresented the capabilities of the car. Such misrepresentations fall foul of the Trade Practices Act.

In case you haven't noticed, one of the positive selling points for the new Accord V6 is that it is designed to run on 91 RON*. This is a positive selling point because it has the potential to save the buyer money at the petrol pumps.

* http://www.honda.com.au/wps/wcm/conn...pecifications/

i've got a manual and i've noticed some clicking as well. usually only happens when i am in low revs and then give it a bit to get going. this is with 98ron as well

Quote:

---

Originally Posted by adrianf

i've got a manual and i've noticed some clicking as well. usually only happens when i am in low revs and then give it a bit to get going. this is with 98ron as well

---

Have you reported this to the dealer and Honda Australia??
If yes, whats the reply from them?? There are few unhappy owner out there waiting for reply from Honda. If you have any success story, please share around.
Please make sure you report this is Honda Australia to protect you investment.
Thanks!

we use 98 in all our euro demos.

Quote:

---

Originally Posted by UNLS1

we use 98 in all our euro demos.

---

hi there..
I guess you must be from Honda.
Do you have any idea whats going on with the noise? Seems like all the auto have the same problem.
I am pretty sure its not the fuel problem. However, all honda dealer asked to try few more tank of pertrol!! I just feel like i am being push back....

Why doesnt the Manual Euro have this problem? They both have the same engine.

Must be an issue with the gearbox

Quote:

---

Originally Posted by EuroDude

Why doesnt the Manual Euro have this problem? They both have the same engine.

Must be an issue with the gearbox

---

Yep.

No probs what so ever with mine. 1st, 2nd, or 3rd gear pulls and nothing.

well i've got a manual and i've been using 98ron and i still have a bit of that "clicking".

however it does seems to be getting harder and harder to hear it. i have a feeling by the time i get to my first service it will be undetectable. i'm going to keep monitoriing it.

Have you checked your tyres for stones Adrian?

This has nothing to do with tyres with the greatest of respect.

I have this problem and it has been back to Honda now twice, all of which they CAN hear the noise but cannot replicate as well as I can...funny that...

In any event, the information that I have been provided so far is that due to the high compression of the engine, combined with its relatively small clearances from factory (ie built well and thus a "tight engine") and due to the advancement of timing, some "pinging" can be heard. To be audible pinging or "detonation" is bad, end of story, they have told me NOT to baby the car and NOT to flog it as the engine should loosen up and thus the noise should go away. The car only has 1,500 km's on it at the moment, I personally have not had this with a new car before, I HAVE had it on a built engine with an improper tune, that was obviously rectified as soon as it hit the dyno for its run in tune...

We will see how it goes, to be honest, if I do not baby it, its rare to hear it, I think the extra fuel from the old right foot helps, but that said will see how she goes to 5,000km's...the thing that annoys me is that the engine and box are essentially the same units as the previous model, thus why I got the car. Also I did notice the other day running it in S reduces even further the occurrence of the noise...

Oh and Type R your signature to me is offensive, don't mind a joke but that really is disrespectful to our athletes whom I might add are currently 5th in the medal standings and have little to no funding as compared to other countries let along our able bodied athletes...

Quote:

---

Originally Posted by Bobjones

This has nothing to do with tyres with the greatest of respect.

---

he has manual, not auto. I have manual, no problems what so ever. Hence why I said check your tyres. ;)

(changing my sig...)

Quote:

---

Originally Posted by SPQR

95 RON is the minimum requirement for the CL9 and CU2. You can use 98 RON if you wish; but my point was that dealers have no business telling people to use 98 RON. If the car doesn't work perfectly on the Honda specified 95 RON then Honda has misrepresented the capabilities of the car. Such misrepresentations fall foul of the Trade Practices Act.

In case you haven't noticed, one of the positive selling points for the new Accord V6 is that it is designed to run on 91 RON*. This is a positive selling point because it has the potential to save the buyer money at the petrol pumps.

* http://www.honda.com.au/wps/wcm/conn...pecifications/

---

Point taken ;)

Quote:

---

Originally Posted by UNLS1

we use 98 in all our euro demos.

---

You working for a rich dealership ;)

Quote:

---

Originally Posted by EuroDude

Why doesnt the Manual Euro have this problem? They both have the same engine.

Must be an issue with the gearbox

---

Could be......

Quote:

---

Originally Posted by Type R Positive

Yep.

No probs what so ever with mine. 1st, 2nd, or 3rd gear pulls and nothing.

---

Buy a lotto ticket ;)

Quote:

---

Originally Posted by LXRY

Buy a lotto ticket ;)

---

Nah, I don't think it is like that at all......

Quote:

---

Originally Posted by EuroDude

Why doesnt the Manual Euro have this problem? They both have the same engine.

---

The CU2 Auto and Manual have some differences in level of tune. The Auto produces slightly less torque and the peak is 100rpm lower than the Manual. (234Nm@4,300 rpm v's 230Nm@4,200 rpm).

http://euro.honda.com.au/about-the-c...spx#powertrain

Quote:

---

Originally Posted by Bobjones

...the thing that annoys me is that the engine and box are essentially the same units as the previous model, thus why I got the car...

---

The CU2 engine has improvement over the CL9; such as the increased compression ratio from 10.5:1 in the CL9 to 11:1 in the CU2. This is a substantial improvement in efficiency.

The problem might be related to the relatively high compression ratio but if Honda states in its specification that the CU2 need only use 95 RON then people should not have to buy 98 RON.

Quote:

---

Originally Posted by eur001

Hi all,

I have been talking to a few Euro 09 owners and realised that many of us have to same problem with the "clickling" noise during slow acceleration. All dealers use fuel as the excuse and keep pushing us back by telling us to test is again with a few tank of 98 fuel.
If you have the same problem, please complaint to the dealer and make sure they put it up to Honda Aust so that they can look into this!
At the end of the day, this is our car and we pay some good money for it. We must make sure we satisfy with what we purchase!
Thanks guys!!!

---

Honda euro Lux with Sat Nav Purchased 18th Sept now 1740 KMs still has pinging. Back to Dealer twice and no change. Running on 98 OCT Dealer added 2 bottles of octane booster no change. This pinging it would appear is not a petrol problem, yet dealer keeps saying just keep driving it. now metallic pinging will cause engine damage if left unchecked .( owners manual Page 334). So why hav'nt Honda Australia taken action to advise they are doing something about it. Shouldnt we all write a letter to honda Australia direct to add pressure to this issue. There is a contact page on the www.honda.com.au web site. If you have this problem then please communicate it to honda direct. Unless you do Honda will continue to fend us off through their dealers without an official response. Go to http://www.honda.com.au/wps/wcm/conn...es/Contact+Us/

Luxury Nav Auto purchased July 19th now completed 7700km's. Never had a pinging issue & am averaging 8.9litres per 100km as per computer. Only noise issue has been a rattle from the drink holder lid & the sunvisor swinging around & hitting me in the head when going around a corner & I have it over the drivers side window.

Have always used VPower & use Mobil 1 10w-30 fully synthetic from 1200km's. Other than that no issue's at all. Great car.:thumbsup:

Quote:

---

Originally Posted by jbowly

Honda euro Lux with Sat Nav Purchased 18th Sept now 1740 KMs still has pinging. Back to Dealer twice and no change. Running on 98 OCT Dealer added 2 bottles of octane booster no change. This pinging it would appear is not a petrol problem, yet dealer keeps saying just keep driving it. now metallic pinging will cause engine damage if left unchecked .( owners manual Page 334). So why hav'nt Honda Australia taken action to advise they are doing something about it. Shouldnt we all write a letter to honda Australia direct to add pressure to this issue. There is a contact page on the www.honda.com.au web site. If you have this problem then please communicate it to honda direct. Unless you do Honda will continue to fend us off through their dealers without an official response. Go to http://www.honda.com.au/wps/wcm/conn...es/Contact+Us/

---

I wrote a msg thru the page, hope i will get some reply soon, and will update it here.

Quote:

---

Originally Posted by jbowly

Honda euro Lux with Sat Nav Purchased 18th Sept now 1740 KMs still has pinging. Back to Dealer twice and no change. Running on 98 OCT Dealer added 2 bottles of octane booster no change. This pinging it would appear is not a petrol problem, yet dealer keeps saying just keep driving it. now metallic pinging will cause engine damage if left unchecked .( owners manual Page 334). So why hav'nt Honda Australia taken action to advise they are doing something about it. Shouldnt we all write a letter to honda Australia direct to add pressure to this issue. There is a contact page on the www.honda.com.au web site. If you have this problem then please communicate it to honda direct. Unless you do Honda will continue to fend us off through their dealers without an official response. Go to http://www.honda.com.au/wps/wcm/conn...es/Contact+Us/

---

Good luck and welcome to Honda ):

^^^ Hmmm. The new Subaru WRX sedan can be had with leather, sunroof and sat nav now. And 195kw! I remember my old WRX was reliable and rattle free. Ugly interior though.

New Honda 2009 Euro Ping MARK 1. Announcing the new ping model.
No need to play a CD or listen to the radio you listen to the ping ping ping

Between 30kph and 80 kph as you start to accelerate it has a fantastic rate of pinging. Over 100kph it just pings all the time.In fact its so unique Honda Australia have referred it to Honda Japan as the ping tune is so special.

Just think if you buy the New Honda Euro 2009 model you might get the pinging model to. Yes folks 5000kms traveled already to the wonderful constant pinging tune. It must be a very special model as Honda must think its worth keeping that way as they have'nt bothered to recall the vehicle and havnt been it touch with me for two months

The official line is its covered by warranty and anything that goes wrong Honda will fix it. Er when....well thats another question. Warranty is for 3 years so they can string it out. Nothing in writing of course regarding the problem just telephone call from Heinz the public relations officer.

And so it goes on. Cant tell you how happy I am with the vehicle. Words just dont describe it. But I can tell you my previous Honda Euro (2004 Model) was fantastic. No problems, no worries. really good vehicle. Can I recommend you buy one of those I can highly recommend it

Hold on I have just thought of something. Maybe those crafty buggers at honda have included the pinging option to counter police radar. There you go Ill have to go out tomorrow and try it down the highway and see if i get my picture taken.

If this wasnt so sick in the way Honda are treating us it would be funny so I have tried to make the best of it even though the car cost me $46,000 and Honda is treating us like a mushhroom . Youve bought it and we dont have to hurry to do anything about it.

Hey Guess what. This isnt just a problem with the honda euro its also a problem with the honda TSX in the USA. Now both are the same car just a name change to appeal to the different markets. You can read about their pinging problems too at...http://tsx.acurazine.com/forums/showthread.php?t=684180 It would appear then that this is a world wide problem. The model there was released in early 2008 and they still havent fixed it.
What chance have we got. No wonder Honda here are not saying anything.
Its more serious than we all thought.

Quote:

---

Originally Posted by jbowly

New Honda 2009 Euro Ping MARK 1. Announcing the new ping model.
No need to play a CD or listen to the radio you listen to the ping ping ping

Between 30kph and 80 kph as you start to accelerate it has a fantastic rate of pinging. Over 100kph it just pings all the time.In fact its so unique Honda Australia have referred it to Honda Japan as the ping tune is so special.

Just think if you buy the New Honda Euro 2009 model you might get the pinging model to. Yes folks 5000kms traveled already to the wonderful constant pinging tune. It must be a very special model as Honda must think its worth keeping that way as they have'nt bothered to recall the vehicle and havnt been it touch with me for two months

The official line is its covered by warranty and anything that goes wrong Honda will fix it. Er when....well thats another question. Warranty is for 3 years so they can string it out. Nothing in writing of course regarding the problem just telephone call from Heinz the public relations officer.

And so it goes on. Cant tell you how happy I am with the vehicle. Words just dont describe it. But I can tell you my previous Honda Euro (2004 Model) was fantastic. No problems, no worries. really good vehicle. Can I recommend you buy one of those I can highly recommend it

Hold on I have just thought of something. Maybe those crafty buggers at honda have included the pinging option to counter police radar. There you go Ill have to go out tomorrow and try it down the highway and see if i get my picture taken.

If this wasnt so sick in the way Honda are treating us it would be funny so I have tried to make the best of it even though the car cost me $46,000 and Honda is treating us like a mushhroom . Youve bought it and we dont have to hurry to do anything about it.

---

Well said.. but if they can still sell the car, i dont think they will act quickly!!
Just hope that more potential buyers can read this pinging issue before they sign.

I reckon it's a timing chain rattle.Either it's too loose from the factory or possibly the tensioner needs adjusting,that's if you can,it's most likely self tensioning.Just my thoughts.PS.I'm glad i own a worry free 06 CL9.

Quote:

---

Originally Posted by eur001

Well said.. but if they can still sell the car, i dont think they will act quickly!!
Just hope that more potential buyers can read this pinging issue before they sign.

---

I'll be in Perth on the weekend, we must catch up. :)

Quote:

---

Originally Posted by eur001

Well said.. but if they can still sell the car, i dont think they will act quickly!!
Just hope that more potential buyers can read this pinging issue before they sign.

---

What Pinging Issue, no such problem on my CU2 Auto or 2 others that I personally know of

[QUOTE=SPQR;1891308]Honda specifies 95.........

http://euro.honda.com.au/about-the-c...spx#powertrain

.........Which means that it should not require 98. If dealers say it does then Honda needs to change the specification so that people can make an informed choice. 95 RON is about $1.65 per litre in Darwin at the moment. 98 RON is over $2.00 per litre!!!

With a lot of letters to the media about the same engine noise we are experiencing here in Australia finally they have caved in and given us an answer. It is as follows. Software fix is reputedly available mid February

Dear John, we appreciate that you are concerned about the presence of an engine operational sound as it detracts from your overall enjoyment of the vehicle and we wish to again reassure you that this condition will have no impact on performance or engine reliability. We have been working closely with the technical division of Honda Corporation in Japan and following extensive investigations we can confirm that the condition you are experiencing is not that of “pinging” which is known within the industry as “pre-ignition”. The condition that you are experiencing is a combustion sound taking place after the programmed ignition, namely a “post combustion noise”. As this condition takes place after the programmed ignition and with the piston on its downward stroke, there is no detrimental force or impact within the engine in your vehicle. Therefore your engine has not sustained any damage and we are happy to offer you a guarantee on the engine while you are the owner of this vehicle as a way of reassuring you of our confidence that no wear or damage is occurring to the engine or associated components.

We trust this advice from the manufacturer clarifies the matter.

Regards
Joe Gelsi
Customer Relations Manager
Honda Australia Pty Ltd

With a lot of letters to the media about the same engine noise we are all experiencing finally Honda have caved in and given me an answer. It is as follows... Software fix is reputedly available mid February

Dear John, we appreciate that you are concerned about the presence of an engine operational sound as it detracts from your overall enjoyment of the vehicle and we wish to again reassure you that this condition will have no impact on performance or engine reliability. We have been working closely with the technical division of Honda Corporation in Japan and following extensive investigations we can confirm that the condition you are experiencing is not that of “pinging” which is known within the industry as “pre-ignition”. The condition that you are experiencing is a combustion sound taking place after the programmed ignition, namely a “post combustion noise”. As this condition takes place after the programmed ignition and with the piston on its downward stroke, there is no detrimental force or impact within the engine in your vehicle. Therefore your engine has not sustained any damage and we are happy to offer you a guarantee on the engine while you are the owner of this vehicle as a way of reassuring you of our confidence that no wear or damage is occurring to the engine or associated components.

We trust this advice from the manufacturer clarifies the matter.

Regards
Joe Gelsi
Customer Relations Manager
Honda Australia Pty Ltd

Post combustion noise?
I wonder what it is?

Quote:

---

Originally Posted by Type R Positive

Post combustion noise?
I wonder what it is?

---

Honda's answer reminds me of the news report I heard on ABC radio many years ago just after the earthquake in Kobe, Japan. They were reporting on a CNN broadcaster who was interviewing an American citizen who happened to be in Kobe during the earthquake. The interviewer asked him all sorts of questions about his earthquake experience and, even for the last dumb question, the interviewer demonstrated that he wasn't listening to the interviewee. The interviewer asked him if he knew what caused the earthquake and, after an appropriate pause, the American on the spot said "A Howard Stern fart"....

In any case, the bloke from Honda is partly wrong because pinging, the characteristic metallic sound, is the same as knocking which occurs after the spark plug has fired and is caused by a pocket of mixture exploding away from the ignition front whereas, pre-ignition is caused by a hot ignition source in the the cylinder that pre-ignites the mixture before the spark plug gets a chance to do it at the right time. Pre-ignition is not likely to occur in a fuel injected engine.

His advice that the sound is post combustion is correct but it is pinging or knocking but not pre-ignition as he said.

Both conditions can cause damage to an engine.

Quote:

---

Originally Posted by Type R Positive

Or just buy a manual... :p

---

Interesting, they must change more then the name when they ship the Accord to North America. My wife and I both have 09 6MT TSX/Accord and we both have the same problem as do most 6MT TSX's. Good thing it isn't engine knocking, or so they say.

Quote:

---

Originally Posted by SPQR

In any case, the bloke from Honda is partly wrong because pinging, the characteristic metallic sound, is the same as knocking which occurs after the spark plug has fired and is caused by a pocket of mixture exploding away from the ignition front whereas, pre-ignition is caused by a hot ignition source in the the cylinder that pre-ignites the mixture before the spark plug gets a chance to do it at the right time. Pre-ignition is not likely to occur in a fuel injected engine.

---

Inefficient combustion? Doesn't sound like Honda.....
ECU tune FTW! ;)

Quote:

---

Originally Posted by Type R Positive

Inefficient combustion? Doesn't sound like Honda.....
ECU tune FTW! ;)

---

No it doesn't. But I've said it before: I think that the cause is the higher compression ratio of the CU2 engine compared to the CL9 engine. As Honda has said that they are working on a software fix, they'll probably retard the ignition timing (changing the compression ratio is not feasible) and/or adjust the VTEC in the hope of encouraging a more consistent charge mixture.

All measures that could potentially reduce power and torque.

The Honda bloke is wrong to describe pinging as pre-ignition: They are two different conditions as I had previously described. He has correctly described a post combustion event which is pinging/knocking but not pre-ignition. Pre-ignition of the charge by definition happens before the spark ignition. To say that a post combustion event does not lead to damage is not necessarily correct as it could increase pressures in the cylinder.

Quote:

---

Originally Posted by SPQR

No it doesn't. But I've said it before: I think that the cause is the higher compression ratio of the CU2 engine compared to the CL9 engine. As Honda has said that they are working on a software fix, they'll probably retard the ignition timing (changing the compression ratio is not feasible) and/or adjust the VTEC in the hope of encouraging a more consistent charge mixture.

All measures that could potentially reduce power and torque.

---

11:1 cr is sweet F.A. in the scheme of things.
Is it the cause of the problem? I doubt it very much.

^^^ 11:1 compression ratio is considered a high compression ratio (up from 10.5:1 in CL9). Engines are more likely to ping/knock with a high compression ratio.

Some interesting info at Wiki: http://en.wikipedia.org/wiki/Compression_ratio


Some quotes form Wiki:

"A high compression ratio is desirable because it allows an engine to extract more mechanical energy from a given mass of air-fuel mixture due to its higher thermal efficiency. High ratios place the available oxygen and fuel molecules into a reduced space along with the adiabatic heat of compression - causing better mixing and evaporation of the fuel droplets. Thus they allow increased power at the moment of ignition and the extraction of more useful work from that power by expanding the hot gas to a greater degree.

Higher compression ratios will however make gasoline engines subject to engine knocking, also known as detonation and this can reduce an engine's efficiency or even physically damage it."

"Due to pinging (detonation), the CR in a gasoline/petrol powered engine will usually not be much higher than 10:1, although some production automotive engines built for high-performance from 1955-1972 had compression ratios as high as 12.5:1, which could run safely on the high-octane leaded gasoline then available."

the thing is it's not ping.

^^^ The Honda bloke described it as "post combustion noise". That's what Honda reckons it is. That is exactly what pinging or knocking is.

Some more info at: http://en.wikipedia.org/wiki/Engine_knocking

And some quotes from Wiki:

"Knocking (also called knock, detonation or spark knock, pinking in UK English or pinging in US English) in spark-ignition internal combustion engines occurs when combustion of the air/fuel mixture in the cylinder starts off correctly in response to ignition by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front. The fuel-air charge is meant to be ignited by the spark plug only, and at a precise time in the piston's stroke cycle. The peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle. The shock wave creates the characteristic metallic "pinging" sound, and cylinder pressure increases dramatically. Effects of engine knocking range from inconsequential to completely destructive. It should not be confused with pre-ignition (or preignition), as they are two separate events."

And;

"Pre-ignition (or preignition) in a spark-ignition engine is a technically different phenomenon from engine knocking, and describes the event wherein the air/fuel mixture in the cylinder ignites before the spark plug fires. Pre-ignition is initiated by an ignition source other than the spark, such as hot spots in the combustion chamber, a spark plug that runs too hot for the application, or carbonaceous deposits in the combustion chamber heated to incandescence by previous engine combustion events."

guys, i'm looking to get one of the CU2 soon... so one thing is still making me confused... is this problem appear on all the CU2 model? or is it for specific model and build date?

thanks heaps

Quote:

---

Originally Posted by denot

guys, i'm looking to get one of the CU2 soon... so one thing is still making me confused... is this problem appear on all the CU2 model? or is it for specific model and build date?

thanks heaps

---

Just random. Seems 100x more prominent in the Auto's.

ah thanks mate... I couldnt afford the auto or the lux anyway, so stick with the CU2 manual for me... Ima start hunting soon...

Quote:

---

Originally Posted by denot

ah thanks mate... I couldnt afford the auto or the lux anyway, so stick with the CU2 manual for me... Ima start hunting soon...

---

That's what I got. Base manual. No problems / issues / noises / gremlins at all. Fantastic car. :thumbsup:

Nice to hear that TypeR! I got convince by a mate here (buddah) that has the base manual and can get below 7L/100kms fuel consumption!!! amazing!! (well its amazing coz its not much diff from his Civic 1.8)

Quote:

---

Originally Posted by denot

Nice to hear that TypeR! I got convince by a mate here (buddah) that has the base manual and can get below 7L/100kms fuel consumption!!! amazing!! (well its amazing coz its not much diff from his Civic 1.8)

---

Thats one thing that amazes me too! When I got it on cruise control 110km/h, it uses under 7 very easily!!! When I flog mine and it uses stuff all. I don't know how it does it? :confused:

Quote:

---

Originally Posted by Type R Positive

Thats one thing that amazes me too! When I got it on cruise control 110km/h, it uses under 7 very easily!!! When I flog mine and it uses stuff all. I don't know how it does it? :confused:

---

hey Type R... u got cruze ctrl on the base Manual??? how does it work?

same as cruise control on your FD2

Quote:

---

Originally Posted by denot

hey Type R... u got cruze ctrl on the base Manual??? how does it work?

---

oh? I thought Cruz control is only available for the Auto :p

Quote:

---

Originally Posted by denot

hey Type R... u got cruze ctrl on the base Manual??? how does it work?

---

press cruise, press set and steer. :p

I took my Lux manual out on the weekend and with about 80% highway and the aircon on for most of the time the trip computer was showing an average of 7.3 litres per 100 k's. Pretty happy with that. My manual has no weird noises and I could not be happier with the car.

Quote:

---

Originally Posted by SteveH

I took my Lux manual out on the weekend and with about 80% highway and the aircon on for most of the time the trip computer was showing an average of 7.3 litres per 100 k's. Pretty happy with that. My manual has no weird noises and I could not be happier with the car.

---

So you finally got your car Steve?
So glad you're happy mate, I told you good things come to those who wait! :cool:

Yep, finally got my car. They threw in a tow bar and tints for free for my 'inconvenience'. Love the car, hate the dealer

If all trip computers on the CU2 read the same they read 0.4L/100 below true reading - eg, if it reads 7.2, true reading 7.6. My best to date is 784km - 54.59lts = 6.96. Amazing for a CU2 Auto

Quote:

---

Originally Posted by jbowly

With a lot of letters to the media about the same engine noise we are all experiencing finally Honda have caved in and given me an answer. It is as follows... Software fix is reputedly available mid February

Dear John, we appreciate that you are concerned about the presence of an engine operational sound as it detracts from your overall enjoyment of the vehicle and we wish to again reassure you that this condition will have no impact on performance or engine reliability. We have been working closely with the technical division of Honda Corporation in Japan and following extensive investigations we can confirm that the condition you are experiencing is not that of “pinging” which is known within the industry as “pre-ignition”. The condition that you are experiencing is a combustion sound taking place after the programmed ignition, namely a “post combustion noise”. As this condition takes place after the programmed ignition and with the piston on its downward stroke, there is no detrimental force or impact within the engine in your vehicle. Therefore your engine has not sustained any damage and we are happy to offer you a guarantee on the engine while you are the owner of this vehicle as a way of reassuring you of our confidence that no wear or damage is occurring to the engine or associated components.

We trust this advice from the manufacturer clarifies the matter.

Regards
Joe Gelsi
Customer Relations Manager
Honda Australia Pty Ltd

---

Hmmm I would like to see what this fix really is. Just glad they have "identified it" though I have large doubts that "post ignition" does not cause any damage. So what they are trying to say is that the ECU tune is FUBAR, we will adjust it to use more fuel, retard timing or a combination of both??

The higher CR may have an effect, and 0.5 CR is a large variable, but can easily be adjusted with a head gasket, alot turbo engines get thicker/sandwich head gaskets to lower CR to run more boost, at the detriment of lower down torque at times though, but the benefit is less chance of detonation due to AFR's being too low, especially if running higher octane fuel...

I am not holding by breath for end of Feb, more like end of March if the Honda dealer is anything to go by???

Quote:

---

Originally Posted by buddah51au

If all trip computers on the CU2 read the same they read 0.4L/100 below true reading - eg, if it reads 7.2, true reading 7.6. My best to date is 784km - 54.59lts = 6.96. Amazing for a CU2 Auto

---

Yeah, still blows me away how fuel efficient this car is.

Quote:

---

Originally Posted by Bobjones

Hmmm I would like to see what this fix really is. Just glad they have "identified it" though I have large doubts that "post ignition" does not cause any damage. So what they are trying to say is that the ECU tune is FUBAR, we will adjust it to use more fuel, retard timing or a combination of both??

---

I think it is the fuel mixtures.

Weren't you the one that had the ignition retarded? Apparently that didn't work.

Quote:

---

Originally Posted by SteveH

I took my Lux manual out on the weekend and with about 80% highway and the aircon on for most of the time the trip computer was showing an average of 7.3 litres per 100 k's. Pretty happy with that. My manual has no weird noises and I could not be happier with the car.

---

Hey SteveH
Could you tell em what build date is your Euro.
Mine is 1-May-2008.
Im just curious due to the fact that certain May build cars have had this NOISE that everyone is talking about.
Mine has it as well.
Apart from that the car is awesome.
Love taking it over 4000RPM blows me away...
It has 3,200 kms

Quote:

---

Originally Posted by VIDSEURO

Hey SteveH
Could you tell em what build date is your Euro.
Mine is 1-May-2008.
Im just curious due to the fact that certain May build cars have had this NOISE that everyone is talking about.
Mine has it as well.
Apart from that the car is awesome.
Love taking it over 4000RPM blows me away...
It has 3,200 kms

---

Build date on mine is November 2008. I have only just clocked up 1,000 k's, so it is probably still too early to tell if the noise will appear

Quote:

---

Originally Posted by SteveH

Build date on mine is November 2008. I have only just clocked up 1,000 k's, so it is probably still too early to tell if the noise will appear

---

Thanks SteveH

This is quite interesting as most other Euro's who have a different build date
apart from May 2008 do not have the acceleration rattle or pinging noise as we all call it.
This is my forst Honda car and im dissapointed since the rest of the car i sreally first class, it gets plenty of stares from onlookers.
It has that x factor the others dont have.
Anyhow im hopeful Honda Australia helps all the other owners who have lodged a complaint.

If they dont its going to end up crap creek.
The car of the year will then become the rattle of the century

Mate when i purchased the Euro the dealer threw in the non standard
gear shift from the accesories list, it really compliements the interior quite nicely. Do you have any hassle with the standars gear shift?

Mines a May '08 with 14,669kms.
Not that it's a bad thing, but I can't replicate the dreaded 'noise' no matter what I do.
Lug it, rev it, nothing.

Quote:

---

Originally Posted by VIDSEURO

apart from May 2008 do not have the acceleration rattle or pinging noise as we all call it.

---

How do you know? :confused: